diff --git a/pyproject.toml b/pyproject.toml
index 0442f5b..75ad01b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -44,7 +44,7 @@ dependencies = [
         "pyramid_tm",
         "waitress",
         "WebHelpers2",
-        "WuttJamaican[db]>=0.19.0",
+        "WuttJamaican[db]>=0.19.1",
         "zope.sqlalchemy>=1.5",
 ]
 
diff --git a/src/wuttaweb/progress.py b/src/wuttaweb/progress.py
index 759c2da..047be83 100644
--- a/src/wuttaweb/progress.py
+++ b/src/wuttaweb/progress.py
@@ -92,6 +92,9 @@ class SessionProgress(ProgressBase):
     """
 
     def __init__(self, request, key, success_msg=None, success_url=None, error_url=None):
+        self.request = request
+        self.config = self.request.wutta_config
+        self.app = self.config.get_app()
         self.key = key
         self.success_msg = success_msg
         self.success_url = success_url
@@ -137,7 +140,7 @@ class SessionProgress(ProgressBase):
         """
         self.session.load()
         self.session['error'] = True
-        self.session['error_msg'] = str(error)
+        self.session['error_msg'] = self.app.render_error(error)
         self.session['error_url'] = error_url or self.error_url
         self.session.save()
 
diff --git a/tests/test_progress.py b/tests/test_progress.py
index 8bfce3c..a1e3908 100644
--- a/tests/test_progress.py
+++ b/tests/test_progress.py
@@ -5,6 +5,8 @@ from unittest import TestCase
 from pyramid import testing
 from beaker.session import Session as BeakerSession
 
+from wuttjamaican.testing import ConfigTestCase
+
 from wuttaweb import progress as mod
 
 
@@ -31,10 +33,11 @@ class TestGetProgressSession(TestCase):
         self.assertEqual(session.id, 'mockid.progress.foo')
 
 
-class TestSessionProgress(TestCase):
+class TestSessionProgress(ConfigTestCase):
 
     def setUp(self):
-        self.request = testing.DummyRequest()
+        self.setup_config()
+        self.request = testing.DummyRequest(wutta_config=self.config)
         self.request.session.id = 'mockid'
 
     def test_error_url(self):